Lateral Pressure from privacy fence footing (Fence footing is Short Pile or Column)
Lateral Pressure from privacy fence footing (Fence footing is Short Pile or Column)
(OP)
Can anyone provide me reference or give guidance on how to account for additional Horizontal Loading due to Wind loading from Wood Fence say 6.0ft high fence (fence footing Founded on Short pile/column)behind my SRW Retaining wall.
I will have to add this force in my Base Sliding & Overturning calculation. We have extended base of footing close to the base of the wall so Overturning of footing wouldn't be of any issue i think. The fence footing offset is 2.0ft behind wall.
I would also like to know ways as to how this would be built assuming retaining wall does not have geogrids its designed as gravity wall i can get permission to incorporate sacrificial geogrid layers for increased wall stability.
On one side Pile would get resistance from retaining wall and on other side it would develop resistance from retained soil side.
Would they auger the piles after retaining wall is built or they would place hollow pipe formwork and afterwards fill that with concrete.
Any help would be much appreciated.
Thank you in advance.
I will have to add this force in my Base Sliding & Overturning calculation. We have extended base of footing close to the base of the wall so Overturning of footing wouldn't be of any issue i think. The fence footing offset is 2.0ft behind wall.
I would also like to know ways as to how this would be built assuming retaining wall does not have geogrids its designed as gravity wall i can get permission to incorporate sacrificial geogrid layers for increased wall stability.
On one side Pile would get resistance from retaining wall and on other side it would develop resistance from retained soil side.
Would they auger the piles after retaining wall is built or they would place hollow pipe formwork and afterwards fill that with concrete.
Any help would be much appreciated.
Thank you in advance.





RE: Lateral Pressure from privacy fence footing (Fence footing is Short Pile or Column)
RE: Lateral Pressure from privacy fence footing (Fence footing is Short Pile or Column)
Now for a laterally loaded pile there are changing forces (and force directions) with depth, owing to the nature of the load applied at the surface (i.e., in consideration of moments). That's a unique solution.
I have no idea how to calculate the actual wind load though. . . I'd need a structural engineer for that!
f-d
ípapß gordo ainÆt no madre flaca!
RE: Lateral Pressure from privacy fence footing (Fence footing is Short Pile or Column)
The pier diameter is 18" & it extended down to match base of the wall. The wall design is Gravity wall.I am thinking to add few layers of geogrids to improve my base sliding factors of safety.
Fattdad,
The horizontal load on foundation due to wind is 1800lbs.(9.0kN). My question is how to account for any additional load on my retaining wall.
RE: Lateral Pressure from privacy fence footing (Fence footing is Short Pile or Column)
The 1,800 lbs is on the post?
I dis some fixing on the scan. I could not turn it right side up as it came. I assume wind blows both ways.
RE: Lateral Pressure from privacy fence footing (Fence footing is Short Pile or Column)
Mike McCann, PE, SE (WA)
RE: Lateral Pressure from privacy fence footing (Fence footing is Short Pile or Column)
You can also make this real complicated and run a L-pile analysis and get a more correct pressure but this is the simplest way. You could also take the mass of the foundation in account for a little overturning resistance contribution when they get larger. The method is actually in the AASHRO sign and post foundation guidelines somewhere...
RE: Lateral Pressure from privacy fence footing (Fence footing is Short Pile or Column)
The block is precast modular block with variable depths. Back fill is gravel.1800 lb is applied on the post. Wind will blow both the ways.
Doctormo
i found reaction thrust is around 2 to 3 times based on the post length. In doing further research i found Prasad & Chari have given earth pressure distribution for short rigid piles. Has anyone used this it shows a triangular distribution & the lower portion thrust is 1.7 times the upper portion thrust also the point of rotation lies around 0.7L.
RE: Lateral Pressure from privacy fence footing (Fence footing is Short Pile or Column)
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.